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公开(公告)号：US09431947B2
公开(公告)日：2016-08-30
申请号：US14721786
申请日：2015-05-26
Applicant: Texas Instruments Incorporated
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (A) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
Abstract translation: 一种确定N相永磁电动机（PMM）的转子的角位置（A）的方法。 具有相关联的存储的角位置确定（APD）算法的处理器被编程为实现该算法以使相关联的电动机控制器执行步骤，包括一次将一个向量强制为电流或电压矢量的相位矢量组合到绕组的定子端子 N相是正和负幅度矢量，其中矢量幅度足够小以至不移动转子，并且强制电流或电压矢量的持续时间基本上是恒定的。 对于每个电流或电压矢量测量得到的定子电流或电压电平。 通过产生的定子电流电平或所得到的定子电压电平的叠加产生N维电流矢量或电压矢量。 使用N维电流矢量或电压矢量来确定角位置。
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公开(公告)号：US12042829B2
公开(公告)日：2024-07-23
申请号：US17020625
申请日：2020-09-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
CPC classification number: B08B7/028 , G02B27/00 , G02B27/0006 , F26B5/02
Abstract: For surface wetting control, an apparatus can expel fluid from a droplet on a surface using a transducer mechanically coupled to the surface. A first area of the surface can have a first wettability for the fluid, and a second area of the surface can have a second wettability for the fluid. The first wettability of the first area of the surface can be greater than the second wettability of the second area of the surface. The first area and the second area can have a patterned arrangement.
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公开(公告)号：US20230081528A1
公开(公告)日：2023-03-16
申请号：US18049319
申请日：2022-10-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aravind Samba Murthy , David Patrick Magee
Abstract: A regenerative braking controller for an AC motor. To determine an electromagnetic torque for slowing or stopping the motor, the regenerative braking controller accesses a lookup table to retrieve a braking torque value corresponding to a current estimate of rotor velocity. The retrieved braking torque may correspond to a maximum or minimum torque level at which regenerative braking will occur at the current rotor velocity, or to a torque level at which charging current during regenerative braking will be maximized. If an external mechanical brake is present, the regenerative braking controller can forward an external braking torque signal to a controller so that the mechanical brake can apply the remainder of the braking force beyond that indicated by the regenerative braking torque. A method for establishing the braking torques to be stored in the lookup table is also disclosed.
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公开(公告)号：US11270720B2
公开(公告)日：2022-03-08
申请号：US16730546
申请日：2019-12-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
IPC: G10L25/84 , G10L25/93 , G10L25/21 , G10L21/0364
Abstract: A method includes selecting a frame of an audio signal. The method further includes determining a first power spectral density (PSD) distribution of the frame. The method further includes generating a first reference PSD distribution indicating an estimate of background noise in the frame based on a non-linear weight, a second reference PSD distribution of a previous frame of the audio signal, and a second PSD distribution of the previous frame. The method further includes determining whether voice activity is detected in the frame based on the first PSD distribution of the frame and the first reference PSD distribution.
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公开(公告)号：US20210341731A1
公开(公告)日：2021-11-04
申请号：US17138973
申请日：2020-12-31
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Mohammad Hadi Motieian Najar
Abstract: An apparatus includes a lens, a transducer and a driver, where the lens has a first side, a second side, and a lens radius, and the transducer has a transducer outer radius. The transducer is coupled to the first side of the lens, and the transducer outer radius is less than the lens radius. The driver has output terminals coupled to the transducer and is configured to provide an oscillating drive signal at a non-zero frequency to vibrate the lens. An o-ring is positioned between a clamp and the second side of the lens, where the o-ring has a nominal radius that is less than or equal to a nominal radius of the transducer.
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Patent Agency Ranking
公开(公告)号：US20210313916A1
公开(公告)日：2021-10-07
申请号：US17347753
申请日：2021-06-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US11070155B2
公开(公告)日：2021-07-20
申请号：US16740517
申请日：2020-01-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US11042026B2
公开(公告)日：2021-06-22
申请号：US15903569
申请日：2018-02-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: In described examples, a transducer vibrates a lens element at a first frequency and a different second frequency. Controller circuitry selects one of a cleaning mode and a heating mode in response to an estimated temperature of the lens element. The controller circuitry activates the transducer to vibrate the lens element at the first frequency in response to the controller circuitry selecting the cleaning mode. The controller circuitry activates the transducer to vibrate the lens element at the second frequency in response to the controller circuitry selecting the heating mode.
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公开(公告)号：US20210157130A1
公开(公告)日：2021-05-27
申请号：US17165895
申请日：2021-02-02
Applicant: Texas Instruments Incorporated
Abstract: An apparatus includes a mass detection circuit coupled to a surface covered with a plurality of electrodes. The mass detection circuit is configured to detect a mass of a first droplet present on the surface. The apparatus further includes a transducer circuit coupled to a transducer, which is coupled to the surface and form a lens unit. The transducer circuit configured to excite a first vibration of the surface at a resonant frequency to form a high displacement region on the surface. The apparatus also includes a voltage excitation circuit coupled to the plurality of electrodes. In response to the detection of the mass of the first droplet, the voltage excitation circuit is configured to apply a sequence of differential voltages on one or more consecutive electrodes which moves the first droplet to the high displacement region.
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公开(公告)号：US20210132585A1
公开(公告)日：2021-05-06
申请号：US17146083
申请日：2021-01-11
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
IPC: G05B19/416 , G05B19/29 , H02K29/10 , G05B19/414 , G02B26/00 , G05B19/39 , H02P27/08 , H02P6/16 , H02P6/15 , G05B19/25 , H02P6/182 , G05B19/23
Abstract: In described examples of methods and control systems to control a position and/or velocity of a machine, control circuitry is coupled to receive and dither a control signal, and to compute a control output value according to the dithered control signal and a control function. An inverter is coupled to the control circuitry, to control the position and/or velocity according to the control output value.
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